Fiber-Reinforced Plastic (FRP) tanks are durable, lightweight pressure vessels commonly used in water treatment to contain filter media (like sand, carbon, or multimedia) or ion exchange resin in softeners. They are constructed with a robust polyethylene inner liner and a filament-wound fiberglass exterior, providing excellent strength while being completely non-corrosive and rust-proof. This makes them ideal for environments where water or chemical exposure (such as brine in softeners) would degrade metal tanks. They are available in a wide range of sizes for both commercial and industrial applications.